They played “Bluebirds Over the Mountain” and “2000 Miles”.
Chrissie Hynde, lead singer of The Pretenders, made a guest appearance at Robert Plant's concert at the Royal Albert Hall in London, England.
Together, they played "Bluebirds Over the Mountain," a cover of Ersel Hickey's song that Plant recorded for his new album, Carry Fire , featuring Hynde.
Next, the former Led Zeppelin vocalist introduced the Pretends' track "2000 Miles," saying, "And now a song that only she can sing well."
Check out the fan-recorded video of the moment they sang together:

